Imported scripts from private repository and enforced the naming convention

scripts/archlinux/vagrant.install.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+sudo pacman -S vagrant

scripts/archlinux/virtualbox.setup.bash

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+packages="virtualbox virtualbox-host-modules-arch"
+
+sudo pacman -S ${packages}
+sudo gpasswd -a $USER vboxusers
+#sudo reboot
+
+vbox_version="$(vboxmanage --version)"
+version=${vbox_version%r*}
+file="Oracle_VM_VirtualBox_Extension_Pack-${version}.vbox-extpack"
+
+curl -o /tmp/${file} -s https://download.virtualbox.org/virtualbox/${version}/${file}
+sudo VBoxManage extpack install /tmp/${file} --accept-license=56be48f923303c8cababb0bb4c478284b688ed23f16d775d729b89a2e8e5f9eb --replace